Drilling and tapping device.



0. H. J. DILG.

DRILLING AND TAPPING DEVICE. APPLIOATIOH FILED APRHS'J. 1910.

1 ,07 ,2 l 6 Patented Aug. 26, 1913.

Z SHEETS-11231 1.

C WNW [535.9

W /JVM flaw r W ATTORNEY C. H, J. DILG DRILLING AND TAPPING DEVICE.

APPLIOATION FILED APB.30,1910.

Patented Aug. 26, 1918.

M JE/VTOR m; 91; W 1% ATTORNEY W/T/YESSES 79 /714 M WM 9 6mm CHARLES H. J. DILG, OF NEW YORK. Y.

DRILLXNG AND TAPPING DEVICE.

1,0": new.

Specification of Letters Patent.

Patented Aug. 26, 1913'.

Application filed April 30, 1910. Serial No. 558,583.

To all whom it may concern: I

Be it known that LCniRLEs H. J. Duo, acitizen of the United States of America, and a resident of New York, in the county and State of New York, have invented a certain new and useful Driiling and Tapping Device; Elliill hereby set forth'such a full, clear, and emvt dcscri -tion of the same as wi l enable the invention to be fully under stood by those skilled in the rt.

This invent ion relates to applianc s which may be used for boring holes in metal, stone or other hard substances, or ton cutting threads of internal screws or nuts, and the like; and which are known generally as drillin: and tapping devices.

.Ay invention consists of ceitain novel features of construction and combination and arrangement of arts, forming in operation a simple and efhcient organization.

In order to' enable the invention to be fully understood, I shall proceed to explain the same by reference to the'drawings, illustrati've of embodiments of the invention, which accompany and form a part of this specification,and in which- Figure 1 is a longitudinal sectional view of an appliance constructed according to my invention; F ig. 2 is a view in section taken on the line 2, 2, Fig. 1; Fig. this a longitudinal sectional view of another embodiment of my invention; Fi 3* is a detail sectional view taken'onthe line 3, 3, Fig. 3; Fig. El is a longitudinal sectional view of a drilling and tapping'de'vice embodying my invert tioii, the casing? of which is formed with a yoke and set collar; Fig 5 is a plan view of another embodiment of my invention. Figs. 6 and 'Z are sectional longitudinal views on a reduced scale of other embodiments of my invention, and Fi e. 8 and S are views in detail of mv friction'driving clutch for the flexible shaft.

Like letters of reference indicate like parts in all the views,

This invention is peculiarly adapted for the urpose of drilling and tapping holes in worli which it would be inconvenient and ex ensive to handle in taking it to and from drill presses and tapping machines. lieing of small dimensions and also of a portable nature, it can also be advantageously used in places where a machine of large size could not be conveniently cm )loycd.

The illustrated embodimcntslof my invcir lion consist essentially of a. driving power actuated member, and a driven member provided with a suitable appliance, as a chuck, to hold the cutting tool, or the tap, the latter member being adapted to be connected with the driving member so as; to be operated in a forward or reverse direction, by the f0llowing HHHUSPWTWO oppositely disposed.

wheels are respectively formed with flinch members, intermediate of which is locatcd a third recip matory clutch member, secured to or forming: a part of the driven member, carrying the chuck, which is thereby adapted to he placed in operative relation wi h one or the other of said gears, which are actuated lay the driving member. The oppositely disposed ear Wheels carrying the clutch members respect eiy denoted in lfigs. 3, at and. 5 by the rci'eicxuic {Zl'lUYtOlBIS F, F, which are inolcscd in the casing A" and placed in mesh with an intermediate gear G, and smnetimcs with two oppositely disposed gear wheels G, (i', Working on shafts 5), as shown in 3 and 4, whereby the gear wheels F and 1" will be caused to rotate in opposite directions. The intermediate clutch i'nember is attached to the driven shaft or tool spindle C carrying the chuck C.

By means of the above structure, a revcrsing mechanism is afforded, so that when used for the purpose of tapping, the tap may be run into the hole and out of it, without charming the rotation of the driving shaft. 1 or example, if the tan is hressed against an object, the shaft and clutch are lifted or moved rearward, which causes the intermediate clutch member to come into contact with the clutch member of the rear gear wheel, thus moving the driven member and chuck in a given direction, and when the tool is withdrawn, the friction, "or gravity, causes the clutch of the shaft carrying the chuck to come into contact with the forward gear clutch, and the'driven shaft is consequently rotated in a contrary direction-lhe clutches being thus opened or closed, in operation, by pressing the tool against an-object or by pulling the same backward. \Vhen used as a drilling device, the intermediate clutch member, which otherwise rcma ins movable longitudinally for the purpose of reversing the rotation of. the driven shaft, may be locked by means of a set collar l, or by any other suitable means, so that the driven member will revolve in our direction only/Whether a right hand or a left hand rotation. This is of particular advantage where the driving meansrotates in a left hand direction, as in the case of an electric motor, where a right hand drill may be used by setting the collar so thatthe reversing gears will be constantly kept in mesh. For the'purpose of protecting and adjusting the said set collar, the casing of the appliance is fusually formed with a yoke O.

I ordinarily make one ofthe gear wheels, as 1*, larger in diameter than the other one, as F, whereby, if the intermediate clutch member C is locked in mesh with one of the gear wheels, as F, it will run at a different rate of speed. than when in mesh with the other gear wheel, as F, and consequently, large or small drills may be run at different speeds; or by inserting gear wheels of different ratios, the device may be made capable of imparting any number of speeds to drills or taps of different sizes, or when used for dilferent materials.

My appliance is usually supplied with a plurality of handles, as A, of which, one may be used for holding it, and the other for purposes of guiding and steadying the same, and one or both of these handles may be removable, so that it will be adaptable to two positions, either at the side of the device, or at the back of it. and being hollow,

it may he slipped over a flexible shaft B, or

over a tapered spindle B of the tool, which is adapted to fit into a drill press, for instance, or the said handle may be secured directly onto the frame of the machine, as by being engaged with the thread a' of the Sdl l lC.

Sometimes I dispense with the use of two intermediate gear wheels .G, G" and only em lov one of them as shown in Fi 5 but l 7 a l prcfcr to use both wheels, as when both of the same are used, there is a leverage ex crted on both sides of the gear F, whereby they serve the purpose of taking up or avoiding the strain or side thrust from the gunwheels against the bearings, when only on'; is used.

Wln-r my appliance is used in connection with' a drill press, the tapered spindle B" is inserted into a socket of the machine. If", however. it is operated by means of a [lexible shaft I). ll. latter is connected to the shaft ll as hereinafter described, and the handle may be placed over the tapered spindle, and the side handle may be removed, or both handles may be employed, as il nst rated in Fig. 5.

In Figs. 1 and 2, an arrangement of the parts is shown, where the gear wheels are arranged in parallel, the driving member 1% carrying a gear b which meshes with the gear 1/, mounted on the auxiliary shaft I), at the other end of which is located a gear (1 which meshes with a gear e of the spindle E, which, in turn, meshes with the gear C, the gears 7) and forming clutch members, the same being alterna'tely engaged with the intermediate clutch member C mounted on the shaft or tool spindle C carrying the chuck C.

The casing of the tool is made in two parts A, A, attached together by means of screws (1. passinglhrough the orifices a, and serving to hold a bushing a for the shaftv (l. The driving member or operating spindle B has a recess or channel 5 in which the end of the shaft 0 works, which member may be partly inclosed by the hollow handle A, and a side handle A is also provided for purposes of convenience irnholding the instrument.

In the embodiments shown in Figs. (3 and 7, the parts are so designed that the axes of the gear wheels will lie at right angles to each other. In Fig. the oppositely disposed gear wheels M and N contained in the casing A are driven by the gears Z and Z of the shaft L, the gear N being fixedly attached to the spindle B while in. Fig. 7, the oppositely disposed gears K and K, inclosed in the casing A are driven by the gears and j of the shaft J, the gear K being fixed to the spindle 1 The driving shaft of the device may be provided with a friction coupling which can bemade in one of a number of ways, preferably by making the coupling in two halves, one, the lower, part H of which is shown in Fig. 7, one end of the coupling preferably extending over the driving shaft, and the other end extending over the flexible shaft B. The said parts of the coupling are ordinarily made with grooves into which the shoulder 7a of the driving shaft and the shoulder it of the flexible shaft may respectively work. Upon the top part or cover of the coupling being placed over the lower part H, the two said parts of the coupling may be held together and tightened as desired by means of small adjusting screws in the ordinary manner, or by means of tapered tl'ircads and nuts. The two parts of the coupling may be drawn together or tightened to anv suitable degree, depending upon the size. of the drill or tap, so that when one or the other of the latter is subjected to too much strain, the coupling will slip either on the driving shaft, or on the flexible shaft, or both, and prevent; the breakage of the tool.

Anot'ier form of the coupling is shown in prevent it from slipping off. At It the pin hole is made slightly oval to allow the members h to adapt themselves to the shaft B in case of wear or otherwise.

I wish it to be understood that I do not desire to be limited to the exact details of construction shown and described, for obvious modifications will occur to a person skilledin theart.

What I claim is 1. A portable drilling and tapping device adapted to be moved bodily about in operation and comprising a casing, a longitudinally movable rotatable tool spindle extending into the casing, two gear clutches in the casing arranged to be alternately operatively engaged by the spindle in different longitudinal positions of the spindle, speed and direction changing intermediate means operatively connecting the two ear clutches, and two driving members, one driving member entering through the end of the casing and being directly connected to one gear clutch and the other driving member entering through the side of the casing and being directly connected to the intermediate means, whereby power may be directly applied to either the gear clutch or to the intermediate means.

2. A portable drilling and tapping device adapted to be moved bodily about in operation and comprising a casing, a longitudinally movable rotatable tool spindle extending into the casing, two gear clutches in the casing arranged to be alternately operatively engaged by thespindle in different longitudinal positions of the spindle, speed changing intermediate means operatively connecting the two gear clutches, two driving members, one driving'member entering through the end of the casing and being directly connected to one gear clutch and the other driving member enteringthrough the side of the.

casing and being directly connected to the intermediate means, whereby power may be directly applied to either the gear clutch or to the intermediate means, and a detachable hollow handle adapted to be secured to the casing concentrically of either driving member.

3. A portable drilling and tapping device adapted to, be moved bodily about in operation and comprising a casing, a longitudinally movable rotatable tool spindle extending into the casing, two gear clutches in the casing arranged to be alternately operatively engaged by the spindle in different longitudinal positions of the spindle, means for holding the spindle in locked relation in engagement with either of the two gear clutches, speed-changing intermediate means operatively connecting the two gear clutches, two driving members, one driving member entering through the end of the casing and being directly connected to one gear clutch and the other driving member entering through the, side of the casing and being directly connected to the intermediate means, whereby power may be directly applied to either the gear clutch or' to the intermediate means, and a detachable hollow handle adapted to be secured to the casing concentrically of either driving member.

In testimony of the foregoing specifica-.

tion, I do hereby sign the same in the city of New York, county and State of New York, this first day of September 1909.

CHARLES H. J. DILGr Witnesses:

R015. SCHwARz, J. ODELL FOWLER. 

